已解决1251 - Client does not support authentication protocol requested by server； consider upgrading

Posted 2023-03-30 CoolTiger_程序员

远程连接docker容器中的mysql8.0数据库时出现连接不上

• • 👀1. 场景：
  • 👀2. 原因分析:
  • 🚀3. 解决:
  • • 3.1 方法一
    • 3.2 方法二

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报错信息

1251 - Client does not support authentication protocol requested by server; consider upgrading MySQL client

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👀1. 场景：

远程连接docker容器中的mysql8.0数据库时出现连接不上,mysql8.0版本之前没有该问题.

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👀2. 原因分析:

​ 出现1251的主要原因是由于mysql版本的问题，mysql8.0版本，与mysql8.0以下版本的加密方式不同，导致错误产生。

• MySql 8.0.11 换了新的身份验证插件（caching_sha2_password）,
• 而原来的身份验证插件为（mysql_native_password）。

​ 而客户端工具Navicat Premium12 中找不到新的身份验证插件（caching_sha2_password），因此报上面的错，所以我们将mysql用户使用的 登录密码加密规则还原成 mysql_native_password，即可登陆成功。

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🚀3. 解决:

3.1 方法一

修改root加密方式

​ 1) 查看root或其他用户信息的加密方式

[root@centos7 ~]# mysql -u root -p  #登陆mysql

mysql> use mysql;	# 切换mysql数据库

mysql> select user,plugin from user where user='root';  #查看root的加密方式

​ 2) 改变加密方式

alter user 'root'@'%' identified with mysql_native_password by '123456';

mysql> select user,plugin from user where user='root';

​ 通过上面两步,即可解决问题

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3.2 方法二

添加用户,同时设置登陆加密方式为mysql_native_password,并且给它远程访问权限,完成后这个用户也可以访问.

添加远程登录用户
CREATE USER 'mjh'@'%' IDENTIFIED WITH mysql_native_password BY '123456';
GRANT ALL PRIVILEGES ON *.* TO 'mjh'@'%';

docker部署mysql远程连接 解决1251 client does not support ..

现象：用虚拟机上Docker启动mysql之后无法在本地安装的navicat上远程连接已启动的mysql，错误截图：

原因：mysql 8.0 默认使用 caching_sha2_password 身份验证机制；客户端不支持新的加密方式。

解决方案：

修改用户（root）的加密方式

步骤：

1、进入mysql容器内部

[[email protected] ~]# docker exec -it mysql01 bash

进入之后输入如下命令：

[email protected]:/# mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \\g.
Your MySQL connection id is 12
Server version: 8.0.16 MySQL Community Server - GPL

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\\h‘ for help. Type ‘\\c‘ to clear the current input statement.

会提示并进入mysql容器：输入对应命令

mysql> select host,user,plugin,authentication_string from mysql.user;
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| host      | user             | plugin                | authentication_string                                                  |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| %         | root             | caching_sha2_password | $A$005$[e-mail]<t?SjMyCAGpzJJtUmnYFmTgPoqWOESUfAg9ojwPkd8HzP4 |
| localhost | mysql.infoschema | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session    | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys        | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root             | caching_sha2_password | $A$005$Gr/wA/
                                                                      PHFFzz``OkyuNlZo3K6eObfcdOORjQoG3zvTztdSnkIDOgg5ZkmzRb/ |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
5 rows in set (0.00 sec)

host为 % 表示不限制ip localhost表示本机使用 plugin非mysql_native_password 则需要修改密码

输入如下命令：

mysql>ALTER USER ‘root‘@‘%‘ IDENTIFIED WITH mysql_native_password BY ‘123456‘;

mysql>flush privileges;

再次查询：

mysql> select host,user,plugin,authentication_string from mysql.user;
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| host      | user             | plugin                | authentication_string                                                  |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
| %         | root             | mysql_native_password | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9                              |
| localhost | mysql.infoschema | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.session    | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | mysql.sys        | caching_sha2_password | $A$005$THISISACOMBINATIONOFINVALIDSALTANDPASSWORDTHATMUSTNEVERBRBEUSED |
| localhost | root             | caching_sha2_password | $A$005$Gr/wA/
                                                                      PHFFzz``OkyuNlZo3K6eObfcdOORjQoG3zvTztdSnkIDOgg5ZkmzRb/ |
+-----------+------------------+-----------------------+------------------------------------------------------------------------+
5 rows in set (0.00 sec)

已经修改完成，点击连接：